My lens got some "bubble" inside

Started 9 months ago | Discussions
John31000 New Member • Posts: 15
My lens got some "bubble" inside
1

Hello everyone

I've bought a lens refurbished like one years ago. I was very new to photography, now I've noticed that there are some bubble inside the lens very very small.

Do you know what is it ? If I can repair it ?

I've never had any problem taking picture with the lens. The quality is good.

Here 2 pictures, maybe if you can tell me if it's normal

Micro bubble inside my panasonic 14-140

Picture taken with this lens at 14mm :

JPG , 800 iso , 14mm f3.5

I wanted to sell this lens. Do you think I should sell at a low price ?

Thanks you

bclaff Forum Pro • Posts: 11,659
Re: My lens got some "bubble" inside
1

John31000 wrote:

Hello everyone

I've bought a lens refurbished like one years ago. I was very new to photography, now I've noticed that there are some bubble inside the lens very very small.

Do you know what is it ? ...

Micro bubble inside my panasonic 14-140

..

I don't see anything except dust and reflections

But a tiny defect is unlikely to affect image quality so I wouldn't worry about it.

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

FrancoD Forum Pro • Posts: 14,704
Re: My lens got some "bubble" inside
3

I made it a bit more obvious

it is a common problem with a somewhat similar Sony lens.

Most think is fungus, I think that is some type of balsam separation because it happens between cemented elements and it is spread around evenly. Fungus grows at random . The Sony replacement cost for thse two elements is around $250, I have no idea of what Panasonic would charge for it but probably not much less.

BTW, IF it is what I think it is, it can't be cleaned.

This is a photo of the Sony lens , posted in the Sony A forum.

You should be able to see the similar pattern. Some think that it is cause by leaving the lens in the sun . Could be right..

(in the old film day was simply the balsam failing but the separation was a lot more obvious than that)

Aoi Usagi Senior Member • Posts: 2,595
Re: My lens got some "bubble" inside
2

John31000 wrote:

Hello everyone

I've bought a lens refurbished like one years ago. I was very new to photography, now I've noticed that there are some bubble inside the lens very very small.

Do you know what is it ? If I can repair it ?

Separation. The front doublet is starting to separate from each other. This is actually a defect in the optical adhesive, and is quite common with budget lenses. The Sony E 55-210mm comes to mind. There is no way to economically repair it.

I've never had any problem taking picture with the lens. The quality is good.

It will most likely get worse over time. Once fully separated, there will be an air gap that was not accounted for in the design of the lens. This added air gap might cause low contrast, flare, and overall image degradation. I would keep using it until you see issues in the picture.

Here 2 pictures, maybe if you can tell me if it's normal

Micro bubble inside my panasonic 14-140

Picture taken with this lens at 14mm :

JPG , 800 iso , 14mm f3.5

I wanted to sell this lens. Do you think I should sell at a low price ?

Thanks you

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Formally Evogt500

Dana F Regular Member • Posts: 163
Re: My lens got some "bubble" inside

Go to this link........https://www.mu-43.com/threads/weird-crystals-in-panasonic-14-140mm-f-3-5-5-6-ii.97402/

Several cases of where it's happening. Good Luck.

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